Maintained developer directory

API Testing Tools Directory

Compare 10 API clients and testing tools using source-backed facts about platform support, pricing, open-source status, API availability, and integrations.

10 entries · Last reviewed · Source-backed facts

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Category
Platform
Pricing

  • API Client · API Testing · GIT Native

    Bruno

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    Git-native API client that stores collections as files and supports desktop and command-line workflows.

    Pricing
    Freemium
    Free plan
    Yes
    Open source
    Yes
    Self-hosted
    Unknown
    API
    Unknown
    Platforms
    Macos · Windows · Linux · CLI
    Sources (3)

    Last verified 2026-09-09

  • API Client · API Testing · API Development

    Hoppscotch

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    Open-source API development ecosystem with web, desktop, CLI, and self-hosted deployment options.

    Pricing
    Freemium
    Free plan
    Yes
    Open source
    Yes
    Self-hosted
    Yes
    API
    Unknown
    Platforms
    WEB · Macos · Windows · Linux · CLI
    Sources (2)

    Last verified 2026-09-09

  • API Client · API Testing · Http Client

    HTTPie

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    HTTP client family spanning web, desktop, and terminal interfaces for inspecting and testing API requests.

    Pricing
    Unknown
    Free plan
    Unknown
    Open source
    Unknown
    Self-hosted
    Unknown
    API
    Unknown
    Platforms
    WEB · Macos · Windows · Linux · CLI
    Sources (2)

    Last verified 2026-09-09

  • API Client · API Testing · API Design

    Insomnia

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    Open-source desktop API client for designing, debugging, and testing HTTP and GraphQL APIs.

    Pricing
    Freemium
    Free plan
    Yes
    Open source
    Yes
    Self-hosted
    Unknown
    API
    Unknown
    Platforms
    Macos · Windows · Linux · CLI
    Sources (2)

    Last verified 2026-09-09

  • API Client · API Testing · Grpc Client

    Kreya

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    Desktop API client for REST, GraphQL, gRPC, WebSocket, and SSE requests with testing workflows.

    Pricing
    Freemium
    Free plan
    Yes
    Open source
    Unknown
    Self-hosted
    Unknown
    API
    Unknown
    Platforms
    Macos · Windows · Linux
    Sources (2)

    Last verified 2026-09-09

  • API Client · API Testing · API Platform

    Postman

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    API collaboration and testing platform with web, desktop, and command-line clients.

    Pricing
    Freemium
    Free plan
    Yes
    Open source
    Unknown
    Self-hosted
    Unknown
    API
    Unknown
    Platforms
    WEB · Macos · Windows · Linux · CLI
    Sources (2)

    Last verified 2026-09-09

  • API Testing · Functional Testing · Soap Testing

    SoapUI

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    Open-source functional API testing application with support for SOAP and REST testing workflows.

    Pricing
    Free
    Free plan
    Yes
    Open source
    Yes
    Self-hosted
    Unknown
    API
    Unknown
    Platforms
    Macos · Windows · Linux
    Sources (2)

    Last verified 2026-09-09

  • API Client · API Testing · IDE Extension

    Thunder Client

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    Developer-focused REST client for IDE workflows with local storage, Git synchronization, and CLI support.

    Pricing
    Freemium
    Free plan
    Yes
    Open source
    Unknown
    Self-hosted
    Unknown
    API
    Unknown
    Platforms
    CLI
    Sources (2)

    Last verified 2026-09-09

  • API Client · API Testing · Local First

    Yaak

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    Local-first API client with desktop and CLI workflows plus Git-based sharing for request collections.

    Pricing
    Freemium
    Free plan
    Yes
    Open source
    Yes
    Self-hosted
    Unknown
    API
    Unknown
    Platforms
    Macos · Windows · Linux · CLI
    Sources (2)

    Last verified 2026-09-09

Methodology and freshness

How this directory is maintained

Reviewed

Inclusion criteria: This is a sampled directory, not an exhaustive catalog or a ranking. The pilot includes developer-facing API clients and API testing products with current official product, documentation, or pricing sources that can be reviewed directly.

Freshness policy: Every modeled fact carries a source-linked verification state. When an official source does not support a claim clearly enough, the field stays Unknown instead of being inferred. Pricing and free-plan facts are reviewed on the shortest cadence; platform, API, integration, and other product facts follow the shared Directory freshness policy.